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Load Flow

GATE Electrical Engineering · Power Systems - Load Flow Analysis · 1992-2026

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2026 Q18

Consider a power system with N buses, of which P are generator buses and the remaining Q are load buses (where there is no generation). Assume that there are no reactive power-limi...

mediumanswer key
2025 Q24

During a power failure, a domestic household uninterruptible power supply (UPS) supplies AC power to a limited number of lights and fans in various rooms. As per a Newton-Raphson l...

mediumanswer key
2025 PYQ

During a power failure, a domestic household uninterruptible power supply (UPS) supplies AC power to a limited number of lights and fans in various rooms. As per a NewtonRaphson lo...

easyanswer keybasic explanation
2023 Q41

The three-bus power system shown in the figure has one alternator connected to bus 2 which supplies 200 MW and 40 MVAr power. Bus 3 is infinite bus having a voltage of magnitude |V...

medium
2021 PYQ

Consider a power system consisting of $N$ number of buses. Buses in this power system are categorized into slack bus. $P V$ buses and $P Q$ buses for load flow study. The number of...

mediumanswer keybasic explanation
2018 Q21

A 10-bus power system consists of four generator buses indexed as G1, G2, G3, G4 and six load buses indexed as L1, L2, L3, L4, L5, L6. The generator-bus G1 is considered as slack b...

mediumanswer key
2018 Q25

In a load flow problem solved by Newton-Raphson method with polar coordinates, the size of the Jacobian is 100 × 100. If there are 20 PV buses in addition to PQ buses and a slack b...

mediumanswer key
2017 PYQ

In a load flow problem solved by Newton-Raphson method with polar coordinates, the size of the Jacobian is $$\,100\,\, \times \,\,100.$$ If there are $$20$$ PV buses in addition to...

medium
2017 PYQ

A 10-bus power system consists of four generator buses indexed as G1, G2, G3, G4 and six load buses indexed as L1, L2, L3, L4, L5, L6. The generator bus G1 is considered as slack b...

medium
2016 PYQ

In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the PV buses are converted to PQ...

mediumanswer key
2014 PYQ

A 183-bus power system has 150PQ buses and 32 PV buses. In the general case, to obtain the load flow solution using Newton-Raphson method in polar coordinates, the minimum number o...

easy
2006 PYQ

The Gauss Seidel load flow method has following disadvantages. Tick the incorrect student.

easyanswer key
1996 PYQ

If the reference bus is changed in two load flow runs with same system data and power obtained for reference bus taken as specified P and Q in the latter run

mediumanswer key
1995 PYQ

In load-flow analysis, a voltage-controlled bus is treated as a load bus in subsequent iteration for a _________limit is violated.

easy
1993 PYQ

In load flow analysis, the load connected at a bus is represented as

easyanswer key
1992 PYQ

In load flow studies of a power system, the quantities specified at a voltage-controlled bus are ____________and___________

easy